Identify the incorrect statement from the following.

Options

A. Reservoir pool for phosphorus cycle is earth's crust whereas atmosphere is the reservoir pool for carbon cycle.
B. During carbon cycle and phosphorus cycle, there is very little respiratory release of carbon and phosphorus.
C. Atmospheric inputs of phosphorus through rainfall are much smaller than carbon inputs.
D. Gaseous exchanges of phosphorus between organism and enviornment are negligible.

Answer

To identify the incorrect statement from the given options regarding the nutrient cycles, we will analyze each statement one by one.

### Step 1: Analyze the first statement
**Statement:** "Reservoir pool for phosphorus cycle in earth's crust whereas atmosphere is the reservoir pool for the carbon cycle."

**Analysis:**
- The phosphorus cycle is indeed sedimentary, with its main reservoir being the earth's crust.
- The carbon cycle is primarily gaseous, with the atmosphere serving as its main reservoir.

**Conclusion:** This statement is correct.

### Step 2: Analyze the second statement
**Statement:** "During carbon cycle and phosphorus cycle, there is very little respiratory release of carbon and phosphorus."

**Analysis:**
- In the carbon cycle, significant amounts of carbon are released back into the atmosphere through respiration by producers and consumers.
- In contrast, the phosphorus cycle has minimal respiratory activity since phosphorus does not cycle through the atmosphere in significant amounts.

**Conclusion:** This statement is incorrect because it inaccurately describes the carbon cycle.

### Step 3: Analyze the third statement
**Statement:** "Atmospheric inputs of phosphorus through rainfall are much smaller than that of the carbon inputs."

**Analysis:**
- Phosphorus does not have a significant gaseous phase and thus the inputs through rainfall are indeed much smaller compared to carbon inputs, which are substantial due to various processes including respiration, combustion, and photosynthesis.

**Conclusion:** This statement is correct.

### Step 4: Analyze the fourth statement
**Statement:** "Gaseous exchanges of phosphorus between organisms and environment are negligible."

**Analysis:**
- Phosphorus is primarily found in solid forms (like phosphates) and does not have a significant gaseous phase in the environment. Therefore, gaseous exchanges are indeed negligible.

**Conclusion:** This statement is correct.

### Final Conclusion
After analyzing all the statements, the incorrect statement is the second one: "During carbon cycle and phosphorus cycle, there is very little respiratory release of carbon and phosphorus."